To better understand the difference of while loop & do..While loop, you have to know the syntax of this loop.The syntax of While loop is as follows:
while (variable<=end_value)
{
//Code to be executed writes here
}
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| While Loop |
While loop Example in JavaScript:
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| <script type="text/javascript">
var1=0;
while (var1<=5)
{
document.write("The number is " + var1+"<br />");
var1++;
}
</script>
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| Do While Loop |
The syntax of do…while is as follows:
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| do
{
//code to be executed writes here
}
while (variable<=end_value);
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do.. while Example in JavaScript:
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| <script type="text/javascript">
var1 = 0;
do
{
document.write("The number is " + var1+ "<br />");
var1++;
}
while (var1 <= 5)
</script>
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- So, In the case of the while loop, the condition is checked first, if the condition is false, the block will not be executed.
- On the other hand, In case of the do…while loop, the condition is checked after the block is executed; therefore the block is always executed at least once.
Programming: Computer Programming for Beginners: Learn the Basics of Java, SQL & C++ (Coding, C Programming, Java Programming, SQL Programming, JavaScript, Python, PHP)
